Well the only things why E-ticket wouldn't work is if it's connected to the card of purchaser and someone else than the one who pays the ticket try to travel or if the site you buy it wont make the reservation for you.

besides that, they normally don't even check the ticket, but just ask your name and so and check it from the computer. They actually had to do it that way the last time I traveled because I guess I deleted my Email and I couldn't remember where I bought my ticket. So don't worry, you will be all set

Hopefully you enjoy your time with Shatara... no matter how much you try to deny it